Telegraph-repeater.



R. H. TUDOR. TELEGRAPH REPBATER. APPLIUATION FILED MAY s, 1910.

Patented Aug. 9, 1910.

Attorneys Witnesses nnrrnn s aren ROBERT H. TUDOR, OF CORINTH,MISSISSIPPI, ASSIGNOR OF ONE-HALF TO ERNEST F.

WAITS, OF CORINTI-I, MISSISSIPPI.

TELEGRAPI-REPEATER.

Specification of Letters Patent.

Patented Aug. 9, 1910.

To all whom it may concern:

Beit known that I, ROBERT H. TUDOR, a citizen of the United States,residing at Corinth, in the county of Alcorn and State of Mississippi,have invented a new and useful Telegr'apli-Repeatei, of which thefollowing is a specification.

This invention has reference to improvements in telegraph repeaters andits object is to provide a repeater wherein all local circuitinstrumentssuch as transmitters, repeating Sounders, and holding magnetsare eliminated and by so eliminating the instruments named it also doesaway with the necessity for extra batteries to keep such local circuitinstruments in operation.

The invention comprises two relays of standard type with connections soarranged that when the main line circuit on one side of the repeater isbroken there is established a circuit whereby the relay controlled bythe other main line is maintained closed irrespective of the break inthe first named main line, the energy for controlling the relay which ismaintained closed' being drawn from the main battery.

The presentinvention provides means whereby the receiving operator mayreadily break in on the sending operator when desired.

The invention will be best understood from the following descriptiontaken in connection with the accompanying drawing forming a part of thisspecification, which drawing is a diagram illustrating the presentinvention as applied to a telegraph repeater.

F or convenience the instrument may be provided with a base 1 which maybe utilized to house some of the parts of the structure. W'ithin thebase may be installed two rheostats 2, 3, while on the base 1 aremounted two electro-magnets 4, 5, each magnet controlling an armature 6carrying an elastic contact member 7 preferably in the form of a leafspring insulated at the point of connection with the armature lever byinsulating material 8. The spring 7 is continued beyond the free end ofthe armature lever 6 and there carries a contact 9 in the path of whichis a circuit terminal 10 in the form of a thumb screw although any othersuitable terminal structure may be used. The armature lever 6 isprovided with front and back stop screws 1l and 12 respectively, thescrew 12 engaging the spring 7 when the armature lever moves away fromthe respective magnet and at points preferably coincident with thescrews 11 and 12 the facing portions of the armature lever and spring 7carry contacts 13 and 14 respectively. A spring 15 for each armaturelever may be utilized to move the lever away from the respective magnet.

Ignoring binding posts which are usually carried by the base 1, one linewire designated by the numeral 1G and which for convenience ofdescription will be considered as the western circuit of the systemunder consideration, is connected to a conductor 17 leading to the screw10. The other line wire which may be considered as the eastern circuitand is designated by the numeral 18 is connected to a conductor 19leading to the other screw 10. Each armature lever 6 is connected by aconductor 20 to a contact in the path of a switch arm or lever 21, theother side of which lever when in contact with the terminal of t-heconductor 20 is also in contact with the terminal of another conductor22 leading to the respective rheostat 2 or 3 as the case may be. Theswitch arm or lever 21 has another active position which may be at rightangles to the position where the conductors 2O and 22 are coupled and inthis position the switch arm bridges conductors 23, 24, one leading to aconductor 25 connected at one end to the respective spring 7 and at theother end to one side of the magnet 4 or 5 other than the onecontrolling the armature carrying' the said spring 7. The otherconductor, namely the conductor 24 is connected to the respectiveconductor 17 or 19 as the case may be.

Each rheostat 2 and 3 is provided with a switch arm 26 and these twoswitch arms are connected together by a conductor 27. The other sides ofthe two magnets 4 and 5 are connected by respective' conductors 28, 29to a main battery 30, which latter is alsoconnected to ground by aconductor 31 and the conductor 27 is also connected to ground by aconductor 32 which may be coupled to the conductor 31.

It is customary to provide the instrument with four binding posts, oneeach for the two main line conductors 16 and 1S, one for the battery 30and one for the conductor 32, but an additional binding post may beprovided for coupling an additional battery to the conductor 29 so thattwo main batteries may be used if so desired.

In considering the operation of the repeater it is assumed in thediagram that the western circuit 16 is open or broken. This means thatthe circuit which may be traced from main line conductor 16 through theconductor 17 to the screw 10, thence by way of the contact 9 and spring7 to the conductor 25, thence by the magnet 4, no longer causes theenergization of magnet 4 and the armature lever 6 controlled therebytherefore moves away from the magnet unt-il the spring 7 is engaged bythe stop screw 12 in its ypath thus bringing the contacts 13 and 14there located together while breaking the circuit between the contact 9and screw 10 on this side of the instrument. The movement of the contact9 away from the screw 10 breaks the eastern circuit through theconductor 1S. There is however established another circuit as follows,from the battery 30 through the conductors 31, 32 to the conductor 27,thence to the rheostat 3, thence by the conductor 22, switch arm 21, andconductor 20 to the armature lever 6 of the magnet 4, thence by thecontacts 13 and 14 of said armature lever and the spring 7 carriedthereby,vthence by the said spring 7 to the conductor 25, thence to themagnet 5 and returning by the conductor 29 to the battery 30, the magnet5 thus remaining energized and its armature lever G attracted. Whenanother impulse comes over the main line 16 on the closure of thecircuit, the circuit through the magnet 4 is at once established throughthe terminals controlled by the magnet 5 so that the eastern circuitbecomes again closed by the energization of the magnet 4. The rheostats2 and B are adjusted to equal the resistance of the respective mainlines so that when the current from the main battery is being shifted bythe transmitting armature lever from t-he opposite main line circuit tothe rheostat the relay circuits 4 or 5 through which the current passeswill remain uniform. Should the operator on the eastern circuit desireto break in on the operator on the western circuit he opens the circuitwhich would reach the eastern relay 5 on the iirst closed stroke of thewestern relay armature lever and then when the circuit through thewestern relay 4 is broken by the break in the main line conductor 16,the break through the magnet 5 is already established by the separationof the contacts 9 and 10 on that side of the instrument so that thebreak through the repeater is completed.

Since the main line relay serves as a main line transmitter the actionof the repeater is materially quicker than with those types of repeaterswhich have local circuit transmitters. With the present invention one ofthe main line magnets is in an energized state while the other magnetsare opening and closing the armature lever and spring carried thereby tocause the sending of signals to the opposite or second wire.

lVhat is claimed is 1. In a telegraph repeater, main line relay magnets,an armature lever for each magnet, a contact member on and insulated yfrom each armature lever where attached thereto, Contact terminals inthe path one of the other on each armature lever and Contact memberrespectively, another contact on the contact member, and a contactadapted to be connected to a main line conductor and engageable by thelast named contact on the contact member when the latter is moved by therespective magnet.

2. In a telegraph repeater, main line relay magnets, and adjustableresistances for each magnet includable in series therewith, an armaturelever for each magnet, a contact member on and insulated from eacharmature lever where attached thereto, contact terminals in the path oneof the other on each armature lever and contact member respectively,another contact on the contact member, and a contact adapted to beconnected to a main line conductor and engageable by the last namedcontact on the contact member when the latter is moved by the respectivemagnet.

3. A telegraph repeater comprising a main line relay magnet for eachmain line, an armature lever and Contact member thereon for each magnet,a contact in the path of each contact member engageable by the latterwhen the respective magnet is energized, a resistance for each magnetincludable in series therewith and circuit connections for the couplingof main line conductors and a source of electric energy to saidrepeater.

4. In a telegraph repeater, main line relays and resistances includablein series with f ROBERT H. TUDOR.

Vitnesses E. F. WArrs, A. E. BIRCH.

